Now, to the breaking news overnight from afghanistan. Rocket fire at the main u.S. Base, hitting the plane of america's top military official. Abc's chief national security correspondent, martha raddatz, has been tracking the latest. This happened while joint chiefs martin dempsey was on the ground. But the military asked that nothing be reported until dempsey was out of the country on a new plane. Reporter: That's right. It happened after midnight. The attack left shrapnel holes on the crew door. An apache attack helicopter nearby was damaged. And two maintenance workers were slightly injured. They're saying the rocket attack was a lucky shot. Not aimed at the chairman, who was not near the plane and is just fine. Let me give you a sense of the reality of that base. Yes, it's massive. And there's a couple of rocket attacks a month. I've been there when that happens. They rarely do much damage. But make no mistake, they are lethal. They can kill and injure people. It's impossible to say whether for sure chairman dempsey's plane was or was not targeted. And there's lots of aircraft on the field. But the militants would certainly know he was there, george. And, martha, there was another attack when leon panetta was there back in march, right? Yeah. Last march, leon panetta had a scary incident at another base, which they downplayed at the time. An afghan interpreter grabbed a car and tried to drive it into a group that was meeting with secretary panetta. And it could have had a different ending, had he not driven into a ditch. Let's get to josh and the rest of the news.

This transcript has been automatically generated and may not be 100% accurate.